Product Description

Mobil Pyrotec HFD-U series are fire resistant hydraulic fluids engineered to meet the requirements of DIN EN ISO 12922. Thanks to its fully synthetic ester base oil and environmentally friendly additives, Mobil Pyrotec HFD-U series are readily biodegradable in accordance with DIN

ISO 15380. These synthetic-based products are designed to provide high quality hydraulic fluids with high versatility to lubricate a broad range of industrial and off-highway equipment.

Features and Benefits

Mobil Pyrotec HFD-U series shows excellent thermal and oxidation stability that can help reduce maintenance downtime and costs by contributing to system cleanliness and deposit reduction, enabling long oil and filter life. Its outstanding anti-corrosion and anti-wear properties protect system components against wear and scuffing and help provide long equipment life.  It offers a wide range of operation due to its wide low temperature characteristics.

Mobil Pyrotec HFD-U series meet requirements for EU Ecolabel and Blue Angel.


Recommended by ExxonMobil for use in areas with increased risk of fire, such as in steel mills and metallurgical plants as well as in mining where especially underground working is at a high risk of fire. Furthermore, the use is recommended in areas prone to increased environmental risk.

• Hydraulic and oil circulation systems operating in conditions subject to fire hazards or environmentally sensitive areas

• Continuous caster

• Blast furnace

• Reheating furnace

• Underground and open pit mining

• Tunneling

• Forestry equipment

• Construction equipment

Properties and Specifications

Grade ISO 46 ISO 68
Density @ 15 C, kg/l, ASTM D4052 0.92 0.93
Flash Point, Cleveland Open Cup, °C, ASTM D92 >220 >250
Kinematic Viscosity @ 100 C, mm2/s, ASTM D445 10 12.5
Kinematic Viscosity @ 40 C, mm2/s, ASTM D445 48 71
Pour Point, °C, ASTM D97 -39 -33
Viscosity Index, ASTM D2270 195 190

Health and Safety

Health and Safety recommendations for this product can be found on the Material Safety Data Sheet (MSDS) @


It cannot be guaranteed that the product information given above is up to date. For the latest version of the Product Data Sheet we refer to the product library of ExxonMobil.